Machine for casting type.



A. E. MILLER.

MACHINE FOR CASTING TYPE.

APPLIOATION IILED MAY 20, 1909.

Patented Aug. 1, 1911.

4 SHEETS-SHEET 1.

I A. E. MILLER. MACHINE FOE CASTING TYPE.

APPLICATION FILED MAY 20, 1909.

999,513,, 1 Patented Au 1,1911.

4 SHEETS-SHEET 2.

arwanfoz A. E. MILLER.

. MACHINE FOR CASTING TYPE.

APPLICATION FILED MAY 20, 1909. &5 1 3 Patented Aug. 1,1911.

4 SHEETS-SHEET 3.

111mm W 6; W

A. E. MILLER.

MACHINE FOR CASTING TYPE.

APPLIOATIQN FILED MAY 20, 1909.

' Patented Aug. 1,1911.

4 SHEETSSHEET 4.

SAS

ANDREW E. MILLER, OF BALTIMORE, MARYLAND, ASSIGNOR TO NATIONAL .COMPOSI-TYPE COMPANY, OF BALTIMORE, MARYLAND, A CORPORATION OF DELAWARE.

MACHINE FOR CASTING TYPE.

Specification of Letters Patent.

Application filed May 20, 1909. Serial No. 497,203.

To all whom it may. concern:

Be it known that I, ANDREW E. MILLER, of Baltimore, in the State ofMaryland,

have invented certain new: and useful Im duction of meansfor simplifyingthe construction of the pump casing.

A further object is to improve the construction of the pump nipple andthe choker. valve operating therein.

A further object is to provide improved means for actuating the pumpplunger and choker valve in time with each other.

The invention will be hereinafter fully set forth and particularlypointed out in the claims.

In the accompanying drawings :Figure 1 is plan view of a port-ion of atype casting machine with my invention applied thereto. Fig. 2 is atransverse sectional view on the line 2-2, Fig. 1. Fig. 3 is a similarView on the line 3-3, Fig. 1. Fig. 4 is a side elevation. Fig. 5 is asectional View of the pump and its adjuncts, parts being shown insection. Fig. 6 is a detail View of the main pump operating lever. Figs.7 and 8 are detail plan and side views, respectively, of the pump latchlever. Fig. 9 is a detail view of the choker-operating lever. Fig. 10 isa detail of the pump-andchoker-operating lever. Fig. 11 is amodification of the pump. Fig. -12 is a View illustrating the cammechanism. Fig. 13 is a detail thereof.

Referring to the drawings, designates the base of a type castingmachine, and 21.

the mold mechanism, which may be of any suitable or preferredconstruction. Saidbase is provided with parallel supporting bars 22 onwhich is slidingly mounted the metal pot 23, thelatter being providedwith an adjusting screw 24 engaging the end of one of the bars 22,whereby the position of the metal pot may be adjusted with relation tothe mold mechanism.

The metal pot 23 is provided with shouL ders to which are secured thesupporting ears 31 of the pump casing 32. Said casing comprises a pistonchamber 33 and an eduction chamber 34, the latter being ofl"- setlaterally from the piston chamber and preferably cast integraltherewith. The body of the pump, between said chambers, is provided withtwo diverging conduits 35 which lead directly from the piston chamber33, the outer ends of said conduits being closed, preferably by plugs36. The eduction chamber communicates with said conduits 35 by means ofchannels 37. The bottom of chamber 33 is closed by a threaded plug 38.The pump plunger 39 is provided with a spherical socket 40 to receivethe correspondinglyshaped head 41 of the plunger rod 42, ,said rod beingheld in position by means of a threaded bush-ing 43, as shown. In thismanner a universal joint is provided between the plunger 39 and the rod42, thereby insuring a free movement of the plunger and obviating allprobability of binding by reason of any lateral deflec tion of said rod.The upper end of the eduction chamber 34 is exteriorly threaded toreceive the nipple member 44 which is provided with an eduction port 45and a valve seat '46. the channels 37 discharging within said nipplemember above the said valve seat 46. Within said chamber 34 is locatedthe choker valve comprising a stem or shank 47 provided with a taperedport-ion 48 terminating in a cylindrical projection 49 adapted to fillthe port 45, the end of said control the discharge of molten metal. The

tapered portion 48 of the choker is provided with longitudinal groovesor channels 51. The choker is operated by one arm 52 of an angularchoker-lever 53, said lever being pivotally supported by an offsetportion 54 of the pump c'aslng. The arm 52 is projected through anopening 55 formed in the wall of chamber 34, and is pivotally securedina slot 55 formed in the shank 47.

Projecting upwardly from one edge of the metal pot 23 are arms orstandards provided with bearings 61 for a main rock shaft 62. Said armsor standards also serve to support a second shaft 63. Secured to therockshaft 62 is .a' pump-and chokeroperating lever 64, and on the shaft63 is mounted a pump-latch-lever' 65. Said 1evers are connected by alink rod 66, having a slot 67 to receive the pivot pin carried by a head68 of the pump-latch-lever 65, and

forked at its lower end 67 to engage the pin 69 mounted in theslottedend 7 0 of the lever 64. Said lever 65 is provided with alatch-engaging arm 71 arranged at an angle to that portion which carriesthe head 68. Theupp er end of the pump-plunger-rod is secured to thehead 68 at 72, and said head is held normally depressed by means of aspring 73 coiled around shaft. 63 and bearin against a shoulder 74.

The arm 52 of the choker-operating lever 53 is providedwvith a latchengaging portion 75 and adjacent thereto is mounted a roller 76 which isnormally engaged by a projccting cam portion 77 of thepump-andchoker-operating lever 64. The rock-shaft 62 is provided with anarm 78 which is connected by a pitman 7 9 with a crank 80 operated in ansuitable maimer, preferably from the main drive shaft of the machine,Mounted on the rock shaft 62 is,a latchmember 81 provided with twolatch-arms 82, 83, the former being arranged to engage thelatch-engaging ortion 75 of arm 52, and the latter engaging thearm 71 oflever 65. The latch argtn 82 is provided with a lug or shoulder 8adapted to be engaged 'by. the shouldered end of an operating link 85which is reciprocated by a suitable rock shaft 86 located on theopposite side of the meta.lqpot-., The arm or link 85 extends .acrossthe top of the mold portion of the -machine,'"thereby necessitating thedisconnectionythere of from the latch mechanism,

before the mold parts can be lifted out, thereby rendering the moltenmetal mechanism inoperative before the mold can be :11- tered in anymanner. A dental spurts Gui 1110117811 metal are pre-- In this wayaccivented. The link 85 is disengaged from .the lug or shoulder 84 bymeans of an upwardly extended finger 87 carried by the pump-andchoker-operatjng lever 64.

- In Fig. 12 I have shown the crank 80 as secured on one end of the maindrive shaft '90, and on said shaft is loosely mounted a cam member 91which is provided with a gear 92 driven by a suitable pinion not shownand connected with any suitable source of power, the same being substan:

tially the structure illustrated and described in my pending applicationfiled J anuary 16th, 1908, Serial Number 472,680. In the present casethe cam member 91 is loose upon the shaft 90, and adjacent the gear 92is placed a collar 93 secured to said shaft and provided withan arm 94,said arm in turn being provided witha curved, slot arranged to receive aset screw or the like 95 carried by said gear. By this arrangement ,theposition of the, crank 80 with relation to the cams carried by themember 91 can be adjusted for the purpose of more accurately timing theoperation of the various parts.

In the operation of the machine, the spring 73 tends to force the pumpplunger 39 to its lowermost position. The latch arm 83, however, beingnormally in engagement with the arm 71 holds the lever against thetension of said spring, there by maintaining the pump plunger in itsraised position. At the same time spring 88 acting against the arm 53normally tends to retract'the choker-valve fr'om the eduction opening45, said opening being normally closed, however, by reason of said arm52 being held against the tension of its spring by means of the latchmember 82. The operationof the parts is so timed that the latch member82 is first disengaged from the arm 52 of the choker-lever, permittingthe opening of the eduction port, the valve 50 resting against seat 46to prevent leakage around stem 47, and immediately there after, so soonin fact as to be almost simultaneously, the latch 83 is disengaged fromarm 71, permitting the spring 73 to force the pump plunger downwardly,whereupon the molten metal is ejected through the nipple opening 45. Bythis time the arm 78 has rockedthe shaft 62, and as a result, the

headed end 68 of lever 65 is raised by means of rod 66, thereby raisingthe pump plunger and bringing the arm 71 back into pos1 tion to beengaged by the latchmember 83, the latter being rocked at the-propertime to effect such engagement. As the lever 65 moves upwardly, the camportion 77 thereof engages the roller 76, rocking the lever 53 in adirection to close the port or opening 45, and bringing the said leverinto engagement with the latch-member 82. In this preferred structure,and is not illustrated.

Within the eductionchamber 34 is located a choker valve-provided with. astem 47: having at its lower'e'nd a valve 48 adapted to rest upon a seat49. A movable collar 50 is also mounted on said stem and held normallyagainst a stop pin 51 by means of a spring 52. The valve seat 49 isarranged at the end of an induction passage 53 formed in the bottom ofthe casing 32op-f posite chamber 34, said passage communi eating withthe conduit 35. The bore of plunger ascends the valve 48 is raisedpermitting the metal to flow through passage 51 into the conduit thenipple being closed in the usual manner. When the plunger descends, thevalve 48' closes the passage 53 and the molten metal flows through thechannels 55 to the nipple, Where it is discharged. In this manner. aneflicient pump is provided, the same being constructed to take themolten metal in at a low level.

I claim as my invention l. Moltenmetal mechanism for type castingmachines comprising a pump provided with a plunger and a plunger rod, apivoted member, means for pivotally connecting said plunger rod withsaid pivoted member, a spring acting on said pivoted member, means formoving said pivoted member in opposition tosaid spring, locking meansadapted to engage saidpivoted member after such movement, and means forperiodi cally disconnecting said pivoted member and .its locking means,whereby the plunger Will .be operated.

" :2. Molten metal mechanism for type castingma'chines comprising a pumpprovided with a'plungerand a plungerfrod, a pivoted latchj member, meansfor, pivotally connecting said plunger rod with one end of said latchmember," a' spring acting on said latch member, means'for engagingthefr'ee end of said latch member to hold the plunger normally retractedin opposition to said' spring, and means .for periodically disengagingsaid latchmember from its holding means, where by the plunger will beoperated. 3. Molten metal mechanism for type cast-v ing machinescomprising a pump provided with a plunger and a plunger rod, a pivotedlatch member, means for pivotally connect. ing said plunger rod with oneend of said latch member, a spring acting on said-latch member, apivoted latch for engaging said latch member to hold the plungernormallyretracted in opposition to said spring, and means forperiodically disengagin said latch from said latch member, where y theplunger will be operated. I

4. Molten metal mechanism for type casting machines comprising a pumpprovided with a plunger and a plunger rod, a rock shaft, a latch membersecured thereto, connections between said latch member and said plunger,a springencircling said rock shaft, means for engaging said latchmember'to hold said plunger normally retracted in op &

position to said spring, and means for periodically disengaging saidlatch member and its holding means, whereby the plunger will beoperated.

5. Molten metal mechanism for-type casting machines comprising a pumpprovided with a plunger and a plunger rod, a pivoted member, means forpivotally connecting said plunger rod with said pivoted member, a springacting on said member, a rock shaft, a latch carried thereby adapted toengage said pivoted member, and means for periodically operating saidrock shaft to disengage said latch, whereby the plunger will beoperated.

6. Molten metal mechanism for type cast ing machines comprising a pump,a plunger for ejecting molten metal from said pump, means for exerting aconstant pressure upon said plunger, means for holding the plungernormally retracted in opposition to saidpressure, means for periodicallyreleasing said plun er, and independent means for moving said plunger torengage said holding means.

7. Molten metal mechanism for type casting machines comprising a pump, aplunger for ejecting molten metal from said pump, a spring actuatedlatch lever connected with said plunger, means for holding said levernormally retracted in opposition to the spring pressure, means forperiodically releasing said latch lever, and independent means formoving said latch lever to reengage said holding means.

8. Molten metal mechanism for type casting machines comprising a pump, aplunger for ejecting molten metal from said pump, a spring actuatedlatch lever connected with said plunger, a latch member for engagingsaid latch lever, means for periodically disengaging said latch memberfrom said lever, and means for moving said latch lever to reengage saidlatch.

-9. Molten metal mechanism for type casting machines comprising pumpmechanism including a reciprocating choker valve, a choker lever, aspring acting on said lever to unseat said valve, means for movingsaidlever in opposition" to-the spring, pressure, locking means adapted toeifgagesaid lever after such movement, and meansiorperiodicallydisengaging said locking means .from

including a reciprocating choker valve, a choker lever, a spring actingon said lever to unseat said valve, means for holding said levernormally retracted in opposition to the spring pressure, means forperiodically operating said holding means to free said choker lever, andmeans for automatically moving said choker lever to reengage saidholding means. a

, 12. Molten metal mechanism for type casting machines comprising pumpmechanism including a choker valve, a spring actuated choker lever, alatch member adapted to engage said lever to hold the same normallyretracted, means for periodically disengaging said latch member fromsaid lever, and independent means for moving said lever to reengage saidlatch member.

- 13. Molten metal mechanism for type casting machines comprising pumpmechanism including a choker valve, a V choker lever, means for holdingsaid lever normally retracted in opposition to the spring pressure,means for periodically disengaging said latch lever, and a cam memberadapted to move said lever to rengage said holding means.

14:. M lten metal mechanism for type casting machines comprising pumpmechanism including-a choker valve, a spring actuated choker lever, alatch member adapted to hold said lever normally retracted, means forperiodically disengaging said latch member from' said lever, and a cammember adapted to move said lever to ree'ngage said latch member. a 1 v15'. Molten metal mechanism for type casting machines comprising pumpmechanism including a pump plunger and a choker valve, a sprlng actuatedlatch lever connected with said plunger, a spring actuated choker leverconnected with said choker valve, a latch member provided with armsengaging said latch lever and said choker lever, and means for actuatingsaid latch member to successively disengage the latch' arms from saidchoker lever and said latch lever.

16. Molten metal mechanism for type casting machines comprising pumpmechanlsm including a pump plunger and a choker A for engaging saidlatch lever and said choker lever, means for actuating said latch memberto successlvely release said chokerlever and said latch lever, and meansfor moving said choker lever and said latch lever to reengage said latchmember.

17 Molten metal mechanism for type casting machines comprising pumpmechanism including a ,pump; plunger and a choker valve, a springactuated latch lever conspring actuated- I ing also provided with means1 nected with said plunger, a spring actuated choker lever connectedwith said choker valve, means .for holding saidlevers normallyretracted, means for successively disengaging said choker lever and saidlatch lever, a rock shaft, and an arm carried by said rock shaftprovided with means for moving said levers to reengage with theirrespective holding means.

18. Molten metal mechanism for type casting machines comprising pumpmechanism including'a pump plunger and a choker valve, a spring actuatedlatch lever connected with said plunger, a spring actuated choker leverconnected with said choker valve, a latch member provided with armsengaging said latch lever and said choker lever, means for actuatingsaid latch member to successively disengage said arms from said chokerlever and said latch lever, a rock shaft, and an arm carried by saidrock shaft for moving said latch lever and said choker lever to reengagesaid latch arms.

19. Molten metal mechanism for type castng machines comprising pumpmechanism including a pump plunger and a choker valve, a sprlng actuatedlatch lever connected with said plunger, a spring actuated choker leverconnected with said choker valve, means for holding'said levers normallyretracted, means for successively disengaging said choker lever and saidlatch lever from said holding means, a rock shaft, and an arm carried bysaid rock shaft and connected with said latch lever,,s'aid arm be c.engaging said choker lever. 20. Molten metal mechanism for type castngmachlnes comprising pump mechanism includlng a pump plunger andacholzr-rvalve, a spring actuated latch lever connected with sald plunger, aspring actuated choker lever connected with said choker valve, means forholding said levers normally retracted, means for successivelydisengaging said chokerlever and said latch lever from said holdingmeans, a rock shaft, and an arm carried by said rock shaft and connectedwith saidlatch lever, said arm being provided with an elbow adapted toengage said choker lever.

.21. Molten metal mechanism for type casting machines comprising pumpmechanism including a pump plunger and a choker valve, a spring actuatedlatch lever connected with said plunger, a spring actuated choker leverconnected with said choker valve, a latch member provided with armsengaging said choker valve, a latch member rovide with arms engagingsaid latch ever and said chokerlever, means for actuating said latchmember to successively disengage said arms from said choker lever andsaid latch lever, a rock shaft, and an arm carried by said rock shaftand connected with said latch lever, said arm being provided with meansfor engaging said choker lever.

22. Molten metal mechanism for type casting machines comprising pumpmechanism including a pump plunger and a choker valve, a rock shaft,means for operating said rock shaft, and means carried by said rockshaft for successively actuating said plunger and valve.

23. Molten metal mechanism for type casting machines, comprising pummechanism includinga pump plunger an a recip- .rocatory choker valve, arock shaft, means carried by said rock shaft for actuating said plungerand valve, a crank shaft, and rneans operated by said crank shaft foractuating said rock shaft.

24:. Molten metal mechanism for type casting machines comprising pumpmechanism including a pump plunger and a choker valve, a rock shaft,means carried by said rock shaft for actuating said plunger and valve,an arm secured to said rock shaft, a crank shaft, and a pitmanconnecting said crank shaft and said arm.

25. The combination with a mold base adapted to support mold mechanism,of pump mechanism, means for actuating said pump mechanism, a latchmember controlling the operation of said pump mechanism, and anoperating arm for said latch member extended across the top of said moldbase.

26. In molten metal mechanism for type casting machines a pump casingprovided with a piston chamber and an eduction chamber, the latter beingoffset laterally from the former, said casing being provided withdiverging conduits leading from the piston chamber to opposite polnts inthe eduction chamber.

27. In molten metal mechanism for type casting machines a pump casingprovided with a piston chamber and an eduction chamber, said casingbeing provided with an offset portion, a plunger working in said pistonchamber, a choker valve in said eduction chamber, a choker leverpivotally mounted in the offset portion of said pump casing, and meansfor actuating said lever and said plunger.

28. Molten metal mechanism for type casting machines, comprising pumpmechanism including a pump plunger and a choker valve, a rock shaft,means carried by said rock shaft for actuating said plunger and valve, adrive shaft, a crank mounted thereon, means operated by said crank foractuating said rock shaft, and means for adjusting the throw of saidcrank.

29. Molten metal mechanism for type casting machines, comprising pumpmechanism including a pump plunger and a choker valve, a rock shaft,means carried by said rock shaft for actuating said plunger and valve, adrive shaft, a crank mounted thereon for actuating said rock shaft, agear for driving said drive shaft, and means for turning said driveshaft independently of said gear to adjust the throw of said crank.

30. Molten metal mechanism for type casting machines, comprising pumpmechanism-including a pump plunger and a choker valve, a rock shaft,means carried by said rock shaft for actuating said plunger and valve, adrive shaft, a crank mounted thereon for actuating said rock shaft, agear loosely mounted on said drive shaft, a collar secured to said driveshaft, and means for adjustably securing said collar to said gear.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

ANDREW E. MILLER.

Witnesses:

J. WALLACE BRYAN, WALBER P. HALs'roR-

